Authorities in Britain, Sweden, and the United States have arrested eight more people following last week’s closure of Silk Road, a notorious black market website which helped dealers to sell drugs under the cloak of anonymity.

A man accused of running a billion-dollar online drug bazaar known as Silk Road appeared briefly in federal court in San Francisco Friday, but at the request of his defense attorney, his detention hearing was postponed until next week.

A man who was arrested at the Glen Park library in San Francisco on Tuesday on charges of running a billion-dollar online drug market is also accused of seeking two murders-for-hire in January and March of this year to protect his empire.

A hidden website operated by a San Francisco man became a vast black market bazaar that brokered $1.2 billion in transactions for illegal drugs and services, according to court papers made public on Wednesday.